In the Washington Post, I explain how the Danish Left rescued itself — and why the U.S. Left won’t follow its example:

Frederiksen [the Danish prime minister] argues that large-scale immigration undermines progressives. . . . By increasing economic inequality and weakening the country’s sense of cultural cohesion, it reduces voters’ support for the welfare state, whose benefits they increasingly fear will go to new arrivals at their own expense. That’s why Denmark’s ruling Social Democrats have lowered immigration and stepped up deportations.

One familiar reason Democrats in the U.S. won’t follow suit: They’re too outraged by President Trump to think clearly.